29:
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was also severely damaged. The local high school was utilized as an emergency shelter for two or three days after the storm until power was restored throughout the community. The building which housed several newspapers produced locally was damaged and forced the operation to be relocated for several
245:
In
Garrison, straight line wind of 110–130 miles per hour (180–210 km/h) produced widespread damage to structures. Many roofs were partially or fully removed and the walls of some buildings collapsed, including the fire station and town library. Nearly every tree was significantly damaged or
158:. It started on the morning of July 11, 2011, when a powerful long-lasting straight-line windstorm, known as a derecho, developed over central Iowa and carved a path of extensive damage across east central Iowa. The storms first took shape as a cluster of low-end severe storms over
249:
At Vinton, straight line wind in excess of 110 miles per hour (180 km/h) caused damage to numerous roof structures and some exterior walls, including a downtown apartment building. Nearly every tree was significantly damaged or snapped off. The
186:
in the mid-afternoon. Thousands of trees were downed in western Iowa alone, and numerous structures were either damaged or destroyed. The peak winds were estimated to be in the range of 130 miles per hour (210 km/h), equal to a
166:
at 3:30 a.m., it interacted with an outflow boundary from the storms to the north and rapidly intensified as it accelerated eastward. Over the next hour and a half the storm plowed eastward through
162:
during the late afternoon of July 10. The system continued northeastward and entered western Iowa at 1:00 a.m, still only as a marginal line of severe storms. As the system passed through the
259:
north of Vinton, extensive damage was left in the wake of the derecho with more than half of the trees badly damaged. Some estimated it would take 500 years for the area to fully recover.
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event on the lake. A seiche is a situation where lake water ahead of the storms is piled up along the downwind shore (in this case
501:
676:
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294:, this derecho injured six people in the collapse of a festival tent and left more than 860,000 people without electricity.
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would affect the eastern half of the continent, with another significant derecho event occurring on July 17, 2011, over
163:
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275:, producing widespread wind damage. In addition, the strong thunderstorm winds with this system generated a classic
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During the morning hours of July 11, 2011, the line of severe thunderstorms moved very quickly across
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on July 11, 2011, and was the most damaging portion of a much larger derecho event known as
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287:) and then sloshes back and forth across the lake for several hours.
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The derecho started around 3:20 a.m. on Monday morning just north of
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632:"Storm could break ComEd record with 860,000-plus losing power,"
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months. In the
Dudgeon Lake Wildlife Management Area across the
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where the tornado touched down; however, all times are in
604:"July 11, 2011 East Central Iowa Derecho and Severe Wind"
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Intermittent tornado touchdown with damage to crops.
370:
List of confirmed tornadoes – Monday, July 11, 2011
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226:and ended around 18 hours later somewhere in the
63:130 mph (209 km/h; 58.1 m/s) (
654:. National Centers for Environmental Information
630:Janssen, Kim, Mitch Dudek and Stefano Esposito,
684:
8:
246:snapped off. Power outages were widespread.
35:Radar loop of the derecho (Click to animate)
21:
896:2011 natural disasters in the United States
691:
677:
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368:
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587:"Rare "Derecho" left mark on Iowa Monday"
573:"July 11, 2011 East Central Iowa Derecho"
559:"The Cross-Country Derecho of July 2011"
301:
545:
518:
553:
551:
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156:The Cross Country Derecho of July 2011
936:July 2011 events in the United States
618:"11 July 2011 Severe Weather Summary"
598:
596:
7:
252:Iowa Braille and Sight Saving School
711:December 30, 2010 – January 1, 2011
14:
525:All dates are based on the local
648:"Iowa Event Report: EF0 Tornado"
502:June 2012 North American derecho
124:Most severe tornado damage; see
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198:Shortly after this complex, a
164:Northern Des Moines metro area
1:
891:Derechos in the United States
855:August 21 (Goderich, Ontario)
182:region before dissipating in
768:Hackleburg–Phil Campbell, AL
756:April 25–28 (Super Outbreak)
589:. Radio Iowa. July 12, 2011.
507:August 2020 Midwest derecho
138:event struck the states of
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531:Coordinated Universal Time
473:2.21 miles (3.56 km)
784:Tuscaloosa–Birmingham, AL
706:
700:Tornado outbreaks of 2011
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22:July 2011 Midwest derecho
652:National Weather Service
303:Confirmed tornadoes by
191:. One man was killed in
459:Moorland (Jul. 11, EF0)
195:due to a falling tree.
81:Strongest tornado
492:List of derecho events
305:Enhanced Fujita rating
273:Southern Lake Michigan
193:Grand Rapids, Michigan
32:
476:50 yards (46 m)
126:Enhanced Fujita scale
31:
826:El Reno–Piedmont, OK
212:Northern New England
189:Category 4 hurricane
180:Southern Great Lakes
58:Peak wind gust
906:F0 and F1 tornadoes
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298:Confirmed tornadoes
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911:Tornadoes in Iowa
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635:Chicago Sun-Times
497:Tornadoes of 2011
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269:Northern Illinois
160:Southern Nebraska
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931:2011 meteorology
926:2011 in Michigan
916:2011 in Illinois
760:Philadelphia, MS
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448:42.42°N 94.28°W
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870:November 14–16
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228:Atlantic Ocean
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134:A destructive
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101:Areas affected
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453:42.42; -94.28
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389:Start Coord.
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365:July 11 event
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184:West Virginia
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176:Tama Counties
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72:Tornado count
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44:July 11, 2011
43:
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30:
25:
19:
16:Weather event
921:2011 in Ohio
901:2011 in Iowa
865:November 7–8
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800:Ohatchee, AL
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656:. Retrieved
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567:
521:
470:07:52–07:56
399:Path length
289:
266:
248:
244:
221:
197:
155:
133:
65:Vinton, Iowa
18:
746:April 19–24
741:April 14–16
726:March 21–23
451: /
257:Cedar River
885:Categories
845:June 18–22
818:Joplin, MO
736:April 9–11
658:August 19,
541:References
457: (
402:Max width
224:Des Moines
93:Fatalities
60:(measured)
814:May 21–26
750:St. Louis
731:April 4–5
721:March 8–9
527:time zone
380:Location
486:See also
415:Moorland
405:Summary
285:Michigan
263:Illinois
240:Garrison
172:Marshall
148:Michigan
144:Illinois
113:Michigan
109:Illinois
52:18 hours
49:Duration
850:July 11
620:. NOAA.
606:. NOAA.
575:. NOAA.
561:. NOAA.
438:94°17′W
435:42°25′N
420:Webster
292:Chicago
281:Indiana
204:Ontario
136:derecho
88:tornado
41:Date(s)
840:June 1
832:
830:·
828:
824:
822:·
820:
806:
804:·
802:
798:
796:·
794:
790:
788:·
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782:
780:·
778:
774:
772:·
770:
766:
764:·
762:
413:SE of
392:Time (
386:State
332:Total
277:seiche
236:Vinton
208:Quebec
174:, and
150:, and
513:Notes
230:. In
168:Story
660:2020
410:EF0
329:EF5
326:EF4
323:EF3
320:EF2
317:EF1
314:EF0
311:EFU
283:and
271:and
238:and
232:Iowa
218:Iowa
210:and
152:Ohio
140:Iowa
117:Ohio
105:Iowa
394:UTC
376:EF#
290:In
86:EF0
887::
650:.
595:^
548:^
425:IA
396:)
358:1
355:0
352:0
349:0
346:0
343:0
340:1
337:0
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214:.
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836:)
816:(
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758:(
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748:(
692:e
685:t
678:v
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461:)
96:1
75:1
67:)
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